Desk bumper device



May 3,1927. 1,626,955 v A. s. NEWTON DESK BUMPER DEVICE Filed Oct. 8. 1926 IN V EN TOR.

7 ATTORNEY M Patented May 3, 1927.

. LLUNITED{STATES DESK BUMPER DEVICE.

' Application filed October 8, 1926. Serial N0..140,267.

:vMy invention relates to desk bumper de- I vices.

I-Ieretofore it has been attempted to set a piece of rubber in-the desk wall for-the cover to rest upon, but these have been ,-unsuccessful because of the facility of removal or,

severance by the knife of the mischievous student.

The essential objects of my invention are inaccessibility of the parts, immunity to destruction by any means available to the student, durability, and inexpensiveness of construction, and facility of incorporatlon.

To the above ends essentially my inveir ition consists in such parts and in such combinations of parts as fall within the scope :of the appended claims.

In the accompanying drawings which form a part of this specification Figure 1 is a fragmentary side elevation of a desk showing my device incorporated therein,

Figure 2, a fragmentary section on line 12-2 of Figure 1,

Figures 3 and 4-, sections on lines 3--3 and 4l4: respectively of Figure 2,

Figure 5, a perspective View of one bumper unit, and

Figures 6 and 7, detail views of the rubber unit and metal unit respectively of the other bumper unit.

Like reference characters indicate like parts throughout the views.

In the drawings 10 is a desk of any usual construction comprising a base 11, front 12, back 13, sides 14, ledge piece 15, and cover 16 connected to the ledge piece by hinges 17.

In the upper edges of the side walls 14:.

near the front of the desk are cavities 19 each comprising a substantially cylindrical portion 20 and lateral longitudinal rect'angular grooves 21. Into each cavity 19 is forced the metallic master unit 23 of a bumper. Each master unit or plug conslsts of a cylindrical body 24, having in this instance, longitudinal lateral ribs 25. Integral with the center of the body is a post 26. When seated in the desk each body 24: mgidly fits in one of the cavity portions 20, and the ribs 25, when present, snugly occupy two of the grooves 21. The tops of the portions 20 and 25 are flush with the surfaces of the exposed edges of the side or walls 14, while the posts 26 project above said surfaces.

In vertical alignmentwith each cavity 19 is a cylindricalcavity 28. in the lower face of the cover 16.. Each cavity comprises a cylindrical port1on29 and lateral longitudinally .disposed grooves ,30 rectangular in crosssection. ,Forced into each cavity 28 is the receiving; or companion unit ofthe bu mper. The unit includes a metallic sleeve or cy1indrical ring 31 provided in this instance with diametrically oppositely disposed longitu dinal ribs 32 upon its exterior. This unit includes also a solid plug 34 of rubber comprising a cylindrical shank 35 embraced by the ring 31, and a cylindrical head 36 overlapping the end of the ring and flush with the exterior of the latter. When seated in the desk cover the lower ends of the ring 31 and shank 35 are in the plane of the under face of the cover. The ring snugly occupies the lower portion cavity 28, and the ribs, if'present, are tight in the grooves 32. The head 36 of the plug tightly fills the space in the upper portion of the cavity 28.

In operation the post 26 contacts with the exposed lower face of the rubber plug shank 35, thus cushioning and silencing the blow.

While one bumper or pair of cooperating units upon a desk are effective, improved effect is attained by bumpers upon both side walls of the desk as described.

It will be observed that the projecting portion 26 of the unit 23 cannot be severed by a knife or any other implement available to the student, nor can any other part of this unit be cut or mutilated. There is no exposed portion upon the latter that affords a fulcrum for prying the latter from its seat.

The plug 35 is locked in position against withdrawal by its head 36 overlapping the ring 31, and the plug shank 35 is laterally protected by the latter.

In practice reliable and satisfactory results are secured when one or both of the ribs 25 or 32 are omitted, but a greater measure of effectiveness is insured by one or more of such ribs on each unit.

I claim:

1. In a device embodying a movable memher and a relatively fixed member, the combination with such members, of a plug embedded in one of said members and projecting therefrom, a sleeve embedded in the other of said members, and an elastic plug embraced by the sleeve in alignment with the first plug.

2. In a device embodying a movable member and a relatively fixed member, the combination With such members, of aplug embedded in one member and projecting from the same, a sleeve embedded in the other member, and a compressible plug compris- .ing a head overlapping the inner end of the sleeve, and a shank embraced by the sleeve flush with the outer end oi the ring and in alignment with the first plug.

3. In a device embodying a movable member and a relatively fixed member, the combination with such members, of a metallic plug comprising a. body embedded in one member with its end flush therewith and a post projecting from said body, a metallic sleeve embedded in the other member, and a rubber plug locked in the sleeve in alignment with the post.

4. In a device embodying a movable member and a relatively fixed member, the combination with such members, oi? a plug embedded in one member projecting above the same, longitudinal lateral ribs upon the plug, a sleeve embedded in the other member, lateral longitudinal ribs upon the sleeve, and a compressible plug fixed in the sleeve in alignment with the first plug.

In testimony whereof I have affixed my signature.

ALBERT S. NlllV'llON. 

